Teledyne 2120 Operating Instructions Manual

Teledyne 2120 Operating Instructions Manual

Trace nitrogen in argon analyzer
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OPERATING INSTRUCTIONS FOR
Model 2120
Trace Nitrogen in Argon Analyzer
P/N MXXXX
ECO:
DANGER
This instrument is for analyzing nitrogen in argon only.
Do not introduce any flammable or toxic gases into this instrument.
Hazardous voltages exist on certain components internally which may be
lethal. Disconnect power before servicing.
Only authorized personnel should conduct maintenance and/or servicing.
Before conducting any maintenance or servicing, consult with authorized
supervisor/manager.
Teledyne Analytical Instruments

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Summary of Contents for Teledyne 2120

  • Page 1 OPERATING INSTRUCTIONS FOR Model 2120 Trace Nitrogen in Argon Analyzer P/N MXXXX ECO: DANGER This instrument is for analyzing nitrogen in argon only. Do not introduce any flammable or toxic gases into this instrument. Hazardous voltages exist on certain components internally which may be lethal.
  • Page 2 Any safeguards required such as locks, labels, or redundancy, must be provided by the user or specifically requested of Teledyne at the time the order is placed.
  • Page 3 NOTE: Additional information and comments regarding a specific component or procedure are highlighted in the form Symbol of a note. CAUTION: THE ANALYZER SHOULD ONLY BE USED ONLY FOR THE PURPOSE AND IN THE MANNER DESCRIBED IN THIS MANUAL. Teledyne Analytical Instruments...
  • Page 4 Manuals do get lost. Additional manuals can be obtained from Teledyne at the address given in the Appendix. Some of our manuals are available in electronic form via the internet. Please visit our website at: www.teledyne-ai.com.
  • Page 5: Table Of Contents

    1.7.4.3 Purging 1.7.4.4 Safe Repair Procedures 1.7.4.5 General Precautions for Handling and Storing High Pressure Gas Cylinders Operational Theory ..............15 2.1 The Analyzer 2.2 Overrange Protection 2.3 Sample System Installation ................... 19 3.1 Unpacking the Instrument Teledyne Analytical Instruments...
  • Page 6 Model 2120 3.2 Choosing a Location 3.3 Mounting 3.4 Electrical Connections 3.5 Gas Connections 3.5.1 Typical Sample System 3.5.2 Gas Connections to the Instrument 3.6 Purging 3.7 Calibration 3.8 Installation Checklist Operation ..................29 4.1 Powering Up the Analyzer 4.2 Zero and Span Calibration 4.2.1 Before Calibration...
  • Page 7 5.4.11 Low Voltage DC Supply Board 5.4.12 Regulated 255 Hz Power Supply 5.4.13 Digital Panel Meter 5.4.14 Zero and Span Potentiometers Appendix ..................51 A.1 Specifications A.2 Recommended Replacement Parts List A.3 Sample Equipment Calibration Log Form Index ..................... 55 Teledyne Analytical Instruments...
  • Page 8: List Of Figures

    Figure 1-2: Model 2120 Rear Panel ..........5 Figure 1-3: Internal Component Identification ......... 6 Figure 1-4: Internal Components in Card Cage....... 8 Figure 2-1 Block Diagram for the Model 2120 Analyzer ....16 Figure 3-1: Analyzer Dimensions ..........21 Figure 3-2: Electrical Connections ..........22 Figure 3-3: Suggested Sample System.........
  • Page 9: List Of Tables

    Trace Nitrogen in Argon Analyzer List of Tables Table 5-1: Routine Maintenance Schedule........38 Table 5-2: Troubleshooting............39 Teledyne Analytical Instruments...
  • Page 10 Since the use of this instrument is beyond the control of Teledyne Instruments/ Analytical Instruments, referred as TI/AI, no responsibility by TI/AI, its affiliates, and agents for damage or injury from misuse or neglect of this equipment is implied or assumed.
  • Page 11: Introduction

    The Teledyne Model 2120 Trace Nitrogen in Argon Gas Analyzer is a robust analytical tool for measuring trace amounts of nitrogen in argon. There are two separate instruments in the 2120 series to cover different analytical ranges: Series 2120-A (115 V)
  • Page 12: Features

    • Chemical Plants • Welding Gas Management • Semiconductor Manufacturing 1.3 Features The Model 2120 comes equipped with the following standard features: • Digital Panel Meter—convenient and immediate display of the current sample analysis. • Indicator lights—front panel mounted LEDs provide instrument status information at a glance.
  • Page 13: Front Panel

    1.4 Front Panel Operator controls and displays are located on the front panel as shown in Figure 1-1. Figure 1-1 Model 2120 Front Panel • Status Indicator Lights: • Ionizer Light —Illuminates when the 255 Hz power supply is operational and its output is being supplied to the switching relay.
  • Page 14: Rear Panel

    Introduction Model 2120 CAUTION: THE DISPLAY METER INDICATES A LOW LEVEL IMPURITY ANALYSIS WHILE IN THIS MODE. THIS IS NOT THE ACTUAL NITROGEN CONCENTRATION. • Range Switch: Used to select the measurement range maximum ppm. • Digital Panel Meter (DPM) — Displays the nitrogen content of the sample stream in ppm.
  • Page 15: Figure 1-2: Model 2120 Rear Panel

    Trace Nitrogen in Argon Analyzer Introduction Figure 1-2: Model 2120 Rear Panel • Recorder Contacts — A standard barrier terminal connection is installed for connecting a recorder or other external meter to the analyzer. • Test Point Contacts —Provides an mVDC output signal connector for a DC multimeter and is used during calibration.
  • Page 16: Internal Components

    Introduction Model 2120 1.6 Internal Components The internal components can be accessed by removing the top cover of the analyzer. Figure 1-3 shows an inside view of the analyzer and identifies specific components of the analyzer. See also Figure 1-4 for internal components inside the card cage.
  • Page 17 The following list is keyed to Figure 1-3 and serves to identify and briefly describe the function of various internal components of the Model 2120 analyzer. 1. Card Cage for PCB's — Contains the amplifier board, 4-20 mA conversion board, test point jacks. The interface board is on rear of cage.
  • Page 18: Additional Safety Information

    It is not intended to supersede, replicate, or replace any safety documentation or procedures provided from or established official safety sources. Do NOT operate the Model 2120 Trace Nitrogen in Argon Gas Analyzer until you read and understand the operating, Teledyne Analytical Instruments...
  • Page 19: Emergency Procedures

    Obtain the following phone numbers and post them at the site telephone locations. Periodically review the numbers and update them as required. Teledyne Analytical Instruments...
  • Page 20: Basic Safety Requirements

    1.7.2 Basic Safety Requirements The following safety guidelines apply at all times when working with the Model 2120 analyzer: Prevent electrical shock — Unplug and remove the AC power cord from the rear panel before opening and working on the analyzer.
  • Page 21: Summary Of Known Hazards

    AC power cord from the rear panel. 1.7.4.2 P RESSURE WARNING: MISHANDLING OF GAS CYLINDERS COULD RESULT IN DEATH, SERIOUS INJURY, OR PROPERTY DAMAGE. HANDLE AND STORE GAS CYLINDERS WITH EXTREME CARE AND IN ACCORDANCE WITH MANUFACTURER'S INSTRUCTIONS. Teledyne Analytical Instruments...
  • Page 22: Purging

    Introduction Model 2120 Sudden or uncontrolled release of pressurized gas can cause serious injury. The hazards of high pressure can be avoided through careful inspection and handling of cylinders and equipment with proper regulation. Read and understand the MSDSs for the process gases used before operating this analyzer.
  • Page 23: General Precautions For Handling And Storing High Pressure Gas Cylinders

    9. Avoid dragging, rolling or sliding cylinders even for a short distance. Move cylinders by using a suitable hand truck. Teledyne Analytical Instruments...
  • Page 24 Introduction Model 2120 10. Never tamper with safety devices in valves or cylinders. 11. Do not store full and empty cylinders together. Serious suck- back can occur when an empty cylinder is attached to a pressurized system. 12. No part of a cylinder should be subjected to a temperature higher than 52°C (125°F).
  • Page 25: Operational Theory

    Operational Theory Operational Theory 2.1 The Analyzer The Model 2120 Trace Nitrogen in Argon Gas Analyzer is a rack mountable self-contained unit for measuring trace amounts of nitrogen in an argon gas stream. A customer supplied sample system directs a stream of refined argon to the instrument at a pressure between 2 and 7 psig (14-48 kPa).
  • Page 26: Overrange Protection

    1000 ppm. At the heart of the Overrange Protection Circuit in the Model 2120 is a photodiode that detects the ionization glow and generates a warning when the intensity of the emission signal is low.
  • Page 27 If air or moisture are ionized in the analytical cell, ozone emissions are possible. These same conditions apply to any calibration gases used. Section 3.5.1 provides more information on a suitable sample system. Teledyne Analytical Instruments...
  • Page 28 Operational Theory Model 2120 Teledyne Analytical Instruments...
  • Page 29: Installation

    Trace Nitrogen in Argon Analyzer Installation Installation Installation of the Model 2120 Trace Nitrogen in Argon Analyzer can involve potentially hazardous procedures. CAUTION: INSTALLATION SHOULD BE PERFORMED ONLY BY TRAINED AND QUALIFIED PERSONNEL WHO HAVE READ AND UNDERSTOOD THE INSTRUCTIONS IN THIS MANUAL.
  • Page 30: Choosing A Location

    GENERAL PURPOSE AREA AND IS NOT RATED FOR USE IN HAZARDOUS AREAS. 3.3 Mounting The Model 2120 is a rack mountable unit intended for indoor use only. Space and materials required for mounting are: • 5-1/4-inches (13.3 cm) of 19-inch rack space, as shown in Figure 3-1.
  • Page 31: Electrical Connections

    OFF position. 3. Connect the AC power cord to the proper line voltage. This voltage must be stable, transient free, and have a stable frequency for optimum operation. Also, the unit must be properly grounded. Teledyne Analytical Instruments...
  • Page 32: Gas Connections

    Installation Model 2120 4. Connect the 4-20 mA analog recorder output terminals to a recorder, if desired. The recorder output terminals are located on the terminal strip on the back of the analyzer as shown in Figure 3-2. Figure 3-2: Electrical Connections 3.5 Gas Connections...
  • Page 33: Typical Sample System

    A suggested sample system is shown in Figure 3-3. This system allows you to switch the analyzer between zero or span calibrating gases and the process gas streams quickly and efficiently without disconnecting the analyzer and introducing air in the system. Figure 3-3: Suggested Sample System Teledyne Analytical Instruments...
  • Page 34 1/4-in VCR glands with 1/8 in tube stubs are available. • Use a high-quality regulator or device to maintain a constant pressure to the zero, sample, and span inlet lines. Teledyne recommends using a high-purity regulator with the following specifications: •...
  • Page 35: Gas Connections To The Instrument

    3.6 Purging The Model 2120 is equipped with a flow control orifice installed at the analyzer sample inlet to regulate flow and pressure to the analytical cell. With the orifice in place, a maximum inlet pressure of 10 psig (69 kPa) is allowable.
  • Page 36: Calibration

    3.7 Calibration The Model 2120 was calibrated at the factory in accordance with the calibration data shipped with your instrument. Prior to using the instrument for analysis the calibration must be checked using the factory...
  • Page 37: Installation Checklist

    5. The vent tube connection has no leaks, has an unobstructed path to atmosphere, and is at least 1/4-in (0.64-cm) OD. 6. All electrical connections have been made properly and the Power Entry module is set for the appropriate power from your facility. Teledyne Analytical Instruments...
  • Page 38 Installation Model 2120 Teledyne Analytical Instruments...
  • Page 39: Operation

    Operation Operation This section describes the operation and calibration procedures for the Model 2120 Trace Nitrogen in Argon Analyzer. Operation of the analyzer involves potentially hazardous procedures. Only trained and qualified personnel who have read and understood the instructions in this manual should operate this equipment.
  • Page 40: Powering Up The Analyzer

    Operation Model 2120 4.1 Powering Up the Analyzer CAUTION: OZONE EMISSIONS ARE POSSIBLE IF AIR OR MOISTURE ARE IONIZED IN THE SAMPLING SYSTEM. THE SAMPLE PATH MUST BE RELATIVELY FREE OF AIR AND/OR MOISTURE BEFORE APPLYING THE IONIZING VOLTAGE. KEEP THE POWER OFF UNTIL THE ANALYZER IS FULLY PURGED.
  • Page 41: Zero And Span Calibration

    Trace Nitrogen in Argon Analyzer Operation 4.2 Zero and Span Calibration The Model 2120 is designed to provide a linear response over the 0-20/0-200 or the 0-2/0-20 ppm concentration range for nitrogen in argon. Therefore, a two-point (zero and span) calibration is sufficient to define the calibration curve for this analyzer.
  • Page 42: Calibration Steps

    Operation Model 2120 cylinder with a low ppm nitrogen level can be used for zeroing in the low ppm range specified, as long as the N concentration is known. The second point is fixed by a certified span gas normally supplied in a high-pressure cylinder.
  • Page 43: Reading And Recording Data

    4.3 Reading and Recording Data CAUTION: THE DIGITAL PANEL METER MAY INDICATE A NEGATIVE VALUE OR DISPLAY A CONSTANT "1" WHEN HIGH CONCENTRATIONS OF NITROGEN (≥ 0.5 PERCENT) ARE PRESENT. NO MATTER WHAT THE DIGITAL DISPLAY INDICATES, AN Teledyne Analytical Instruments...
  • Page 44: Overrange Protection Circuit

    CONCENTRATIONS OF NITROGEN (≥ 0.5 PERCENT) IN THE SAMPLE LINE. On completion of the zero and span calibrations, the Model 2120 is ready to begin taking readings on the sample gas. 1. Open the valve of the desired sample inlet line.
  • Page 45 The recorder output indicates a full-scale signal or slightly higher. The digital overrange contacts change state (NC to open or NO to closed). If the above events do not occur, suspect a fault in the Overrange Protection Circuit and contact the factory. Teledyne Analytical Instruments...
  • Page 46 Operation Model 2120 Teledyne Analytical Instruments...
  • Page 47: Maintenance

    Trace Nitrogen in Argon Analyzer Maintenance Maintenance CAUTION: MAINTENANCE AND REPAIR OF THE MODEL 2120 ANALYZER INVOLVE POTENTIALLY HAZARDOUS PROCEDURES. ONLY TRAINED AND QUALIFIED PERSONNEL WHO HAVE READ AND UNDERSTOOD THE INSTRUCTIONS IN THIS MANUAL SHOULD WORK ON THIS EQUIPMENT.
  • Page 48: Troubleshooting

    Table 5-2 provides you with information on problems that may occur with the Model 2120 Analyzer. Also included are their probable causes and suggested remedies to the problem. Standard hand tools and a digital multimeter are the only equipment required for most procedures.
  • Page 49 Trace Nitrogen in Argon Analyzer Maintenance The Model 2120 is manufactured in several models. Determine which model you have before proceeding. The model number is found on the serial number label located on the back of the instrument. Table 5-2: Troubleshooting...
  • Page 50 Maintenance Model 2120 Defective PMT. Check and replace if faulty. Defective amplifier board. Check and replace if faulty. Defective high-voltage Check and replace if faulty. PMT socket. Recorder off scale (top or Defective low-voltage Check and replace power bottom) - continued DC power supply.
  • Page 51: Parts Replacement And Testing Guide

    ELECTROCUTION HAZARD. LETHAL VOLTAGE INSIDE — 6000 VOLTS. THIS ANALYZER MUST BE SERVICED ONLY BY A QUALIFIED TECHNICIAN. NEVER OPERATE THE ANALYZER WITHOUT THE COVER SECURED IN PLACE. ALWAYS TURN OFF POWER AND DISCONNECT AC POWER CORD BEFORE SERVICING. Teledyne Analytical Instruments...
  • Page 52: Voltage Selection And Fuse Changing

    Refer to Figures 1-3 and 1-4 for component locations while reading this section. 5.4.1 Voltage Selection and Fuse Changing The Model 2120 Trace Nitrogen in Argon Analyzer can be configured for either 110 or 230 VAC line voltage. Figure 5-1 shows the Power Entry Module with its hinged cover open for access to the fuse cartridge.
  • Page 53: Optical Filter

    PMT when the cover is removed. 2. Remove the PMT cover and optical filter, carefully catching the optical filter with a gloved hand. One side of the 25-mm diameter filter is dark and the other side is mirror-like. The Teledyne Analytical Instruments...
  • Page 54: Low Flow Switch

    Maintenance Model 2120 filter is installed, mirror-side out, from inside the PMT cover when it is removed from the PMT. 3. Wipe the filter clean with a damp, lint-free cloth. Use only water. Do NOT use detergent. 4. Replace the filter into the window opening with the mirror-side out.
  • Page 55: Analytical Cell

    4. Lift the cell and mounting bracket assembly gently to gain access to the electrode connections (D). 5. Remove the transformer high voltage leads from the electrode connections by gently loosening and removing the nuts that hold them in place. Figure 5-2: The Analytical Cell Teledyne Analytical Instruments...
  • Page 56: Photomultiplier Tube

    Maintenance Model 2120 To remove the cell from the cell holder: 1. The cell holder has two side plates that hold the cell in place. To loosen the grip of these side plates, remove the four bolts that hold together the plates: two bolts toward the top of the cell assembly (E) and two toward the bottom (F).
  • Page 57: High Voltage Plate Adjustment

    255 Hz power supply, supplies ionization voltage to the analytical cell. The value of high voltage coming from the transformer is difficult to measure, but an accurate reading is not necessary. To check the transformer: Teledyne Analytical Instruments...
  • Page 58: Amplifier Board

    Maintenance Model 2120 1. Remove the AC power cord from the analyzer. 2. Measure resistance across the primary and secondary transformer windings. The nominal resistance readings of a good high-voltage transformer are 60 ohms across the primary winding and 47.2 K ohms across the secondary winding (output).
  • Page 59: Low Voltage Dc Supply Board

    4. Loosen the terminal connections on the back of the DPM, noting the connections for installation of the new meter. 5. Remove the DPM by sliding it out through the front panel of the analyzer. 6. Replace the DPM, and re-connect the terminal strip wiring. Teledyne Analytical Instruments...
  • Page 60: Zero And Span Potentiometers

    Maintenance Model 2120 5.4.14 Zero and Span Potentiometers The zero and span potentiometers are located underneath the chassis next to the DPM (refer to Figure 1.3). Perform the following steps to replace the potentiometer: 1. Remove the AC power cord from the analyzer, and remove the cover for access to the zero and span potentiometers.
  • Page 61: Appendix

    6 psig (41 kPa) at analytical cell Nominal Sample Inlet Pressure: 2-7 psig (14-48 kPa) Power Required: Model 2120A: ~300 W, 120/230 VAC 50/60 Hz Model 2120 B: ~100 W, 120/230 VAC 50/60 Hz Output: 4-20 mA Dry contacts for Range ID Dry contacts for Overrange Indication Sample Connections: 1/4”...
  • Page 62: Recommended Replacement Parts List

    Appendix Model 2120 A.2 Recommended Replacement Parts List Qty. Part Number Description GM123-281 255 Hz Power Supply GM123-282 4-20 mA Conversion Module GM123-283 Amplifier Board GM15-200 Analytical Cell GM123-284 Brightness Sensor Board GM121-139 Fuse, 2 amp 3AG (120 VAC) GM121-142...
  • Page 63: Sample Equipment Calibration Log Form

    Trace Nitrogen in Argon Analyzer Trace Nitrogen in Argon Analyzer Appendix Appendix A.3 Sample Equipment Calibration Log Form Teledyne Analytical Instruments Teledyne Analytical Instruments...
  • Page 64 Appendix Model 2120 Teledyne Analytical Instruments...
  • Page 65: Index

    15, 51 overrange alarm contact, 5 front panel, 3 overrange alarm light, 3 fuse, 42 overrange protection alarm. See alarm fuse holder, 7 overrange protection circuit, 16, 34 gas connections, 25 overrange protection circuit test, 34 Teledyne Analytical Instruments...
  • Page 66 Index Model 2120 ozone emission, 17 sensitivity, 1, 51 photodiode, 16, 34 serial number, iii photomultiplier tube. See PMT setpoint, 8 plate voltage, 15, 47 shipping damage, 19 PMT, 1, 2 socket. See Hamamatsu PMT socket PMT cover, 7 span control, 2, 4, 8, 50...

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